U.S. patent application number 14/837425 was filed with the patent office on 2015-12-24 for refrigerator appliance with hot water dispenser.
The applicant listed for this patent is Electrolux Home Products, Inc.. Invention is credited to Nilton Carlos Bertolini, David L. Hall.
Application Number | 20150369531 14/837425 |
Document ID | / |
Family ID | 50877647 |
Filed Date | 2015-12-24 |
United States Patent
Application |
20150369531 |
Kind Code |
A1 |
Hall; David L. ; et
al. |
December 24, 2015 |
REFRIGERATOR APPLIANCE WITH HOT WATER DISPENSER
Abstract
A refrigerator is provided, including a cabinet formed with at
least one refrigerated compartment and a door pivotally mounted to
the cabinet via a hollow hinge to selectively open and close at
least a portion of the refrigerated compartment. A water heater is
mounted on an exterior surface of the cabinet about the hollow
hinge and configured to heat water supplied from the refrigerator.
A hot water dispenser is positioned on the door that is configured
to dispense hot water supplied from the water heater into a
receiver vessel, and a hot water conduit is guided through the
hollow hinge and extending from the water heater to the hot water
dispenser to supply the hot water from the heater to the dispenser.
A method of dispensing hot water is also provided. The method
utilizes at least two distinct, user-initiated steps to permit the
dispensing of hot water.
Inventors: |
Hall; David L.; (Piedmont,
SC) ; Bertolini; Nilton Carlos; (Chonburi,
TH) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Electrolux Home Products, Inc. |
Charlotte |
NC |
US |
|
|
Family ID: |
50877647 |
Appl. No.: |
14/837425 |
Filed: |
August 27, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
13838077 |
Mar 15, 2013 |
9139415 |
|
|
14837425 |
|
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Current U.S.
Class: |
222/1 |
Current CPC
Class: |
F25D 23/126 20130101;
F25D 2600/02 20130101; F25D 23/04 20130101; F25D 23/028 20130101;
F25D 2323/122 20130101; B67D 7/82 20130101; B67D 2210/00099
20130101; F25D 2400/02 20130101; F16K 31/06 20130101; F25D 2323/024
20130101; B67D 2210/00118 20130101; F25D 2331/806 20130101; B67D
1/0014 20130101; F25D 23/12 20130101; B67D 1/0007 20130101; B67D
1/1234 20130101; B67D 1/0895 20130101 |
International
Class: |
F25D 23/12 20060101
F25D023/12; F16K 31/06 20060101 F16K031/06; F25D 23/02 20060101
F25D023/02 |
Claims
1. A method of dispensing hot water from a dispenser positioned on
a door of an appliance, comprising the steps of: first, actuating a
hot water activation switch to selectively operate a hot water
heater, wherein the hot water activation switch permits but does
not require dispensing of hot water; next, energizing an on-demand
water heating element to heat water supplied from the appliance,
after the hot water activation switch is actuated; subsequently
actuating a hot water dispensing switch to selectively dispense hot
water by energizing an electrically-operated water valve to permit
water flow through the water heating element; and dispensing hot
water supplied from the water heater via a dispenser nozzle and
into a receiver vessel, after the hot water dispensing switch is
actuated, wherein initiating dispensing of the hot water from the
dispenser nozzle is inhibited unless both of the hot water
activation switch and the hot water dispensing switch are
actuated.
2. The method according to claim 1, wherein the hot water
activation switch, hot water dispensing switch, and
electrically-operated water valve are in operational communication
with a control unit that selectively operates the
electrically-operated water valve based upon input from the hot
water activation switch and hot water dispensing switch.
3. The method according to claim 1, wherein the step of dispensing
hot water occurs only when the hot water activation switch is
actuated prior to the hot water dispensing switch.
4. The method according to claim 1, further comprising the step of
measuring a period of time between actuation of the hot water
activation switch and the hot water dispensing switch, wherein the
step of dispensing hot water occurs only when the measured period
of time is less than a predetermined time limit.
5. The method according to claim 1, further comprising the steps of
moving a dispenser nozzle, that is configured to dispense hot water
therefrom, from a first, non-dispensing position to a second,
dispensing position, and actuating at least one electrically
operated nozzle switch in response to movement of the dispenser
nozzle to a selected one of the first position and the second
position.
6. The method according to claim 5, further comprising the step of
measuring a period of time between the actuation of the hot water
activation switch and actuation of the nozzle switch, wherein the
step of dispensing hot water occurs only when the measured period
of time is less than a predetermined time limit.
7. The method according to claim 1, further comprising the steps of
measuring a period of dispensing time when hot water is being
dispensed from the dispenser nozzle and into said receiver vessel,
and stopping the dispensing of hot water once the measured
dispensing time is equal to or greater than a predetermined
dispensing time limit.
8. The method according to claim 1, further comprising the steps of
measuring an amount of water dispensed from the dispenser nozzle
and into said receiver vessel, and stopping the dispensing of hot
water once the measured amount of water is equal to or greater than
a predetermined dispensing amount limit.
9. The method according to claim 1, wherein the on-demand water
heating element heats water flowing therethrough for substantially
immediate dispensing via the hot water dispenser and without the
use of a separate hot water tank.
10. The method according to claim 1, wherein the
electrically-operated water valve comprises a solenoid-operated
valve.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a divisional of U.S. application Ser.
No. 13/838,077, filed on Mar. 15, 2013. This application is
incorporated herein by reference.
FIELD OF THE INVENTION
[0002] The present application relates generally to refrigeration
appliances, and in particular to dispensing units associated with
refrigeration appliances.
BACKGROUND OF THE INVENTION
[0003] Modern refrigeration appliances, such as household
refrigerators for example, often include as one of their features a
dispenser for dispensing content, the content typically being water
and/or ice. Frequently, the dispenser is located within a recess in
the exterior surface of a door of the appliance. The refrigeration
appliance can take any one of a number of forms. For example, the
refrigeration appliance can have freezer and fresh food
compartments that are arranged side-by-side, the freezer
compartment can be located above the fresh food compartment, or the
freezer can be located below the fresh food compartment. In any
case, separate doors can be provided for the freezer and fresh food
compartments and a dispenser can be located within the recess in
the exterior of at least one of the doors.
[0004] Conventionally, the dispenser can include at least an outlet
for dispensing water and an outlet for dispensing ice. Associated
with the water dispensing outlet can be a lever in the form of a
cradle or other actuating device that is pivotally attached to the
dispenser. In addition to a lever, the actuating device could also
be used with other types of vessel detection such as optical,
visual, or ultrasonic, etc. When water is to be dispensed, a
receiver vessel, usually in the form of a beverage glass, is
pressed against the lever thereby operating a switch or sensor so
as to complete an electrical circuit between a source of electrical
power and a solenoid-operated valve connected to a source of water.
The completion of the electrical circuit opens the
solenoid-operated valve (or even other types of valves, such as
motor actuated valves, etc.) permitting the water to flow from the
source of water to the water dispensing outlet.
BRIEF SUMMARY OF THE INVENTION
[0005] The following presents a simplified summary of the invention
in order to provide a basic understanding of some example aspects
of the invention. This summary is not an extensive overview of the
invention. Moreover, this summary is not intended to identify
critical elements of the invention nor delineate the scope of the
invention. The sole purpose of the summary is to present some
concepts of the invention in simplified form as a prelude to the
more detailed description that is presented later.
[0006] In accordance with one aspect of the present application, a
refrigerator is provided, comprising a cabinet formed with at least
one refrigerated compartment and a door pivotally mounted to the
cabinet via a hollow hinge to selectively open and close at least a
portion of the refrigerated compartment. A water heater is mounted
on an exterior surface of the cabinet about the hollow hinge and
configured to heat water supplied from the refrigerator. A hot
water dispenser is positioned on the door that is configured to
dispense hot water supplied from the water heater into a receiver
vessel, and a hot water conduit is guided through the hollow hinge
and extending from the water heater to the hot water dispenser to
supply the hot water from the heater to the dispenser.
[0007] In accordance with another aspect of the present
application, a method of dispensing hot water from a dispenser
positioned on a door of an appliance is provided. The method
comprises the steps of actuating a hot water activation switch
configured to selectively operate the hot water heater, and
operating a water heating element to heat water supplied from the
appliance, after the hot water activation switch is actuated. The
method further comprises the steps of actuating a hot water
dispensing switch configured to selectively dispense hot water, and
dispensing hot water supplied from the water heater via the
dispenser nozzle and into a receiver vessel, after the hot water
dispensing switch is actuated.
[0008] It is to be understood that both the foregoing general
description and the following detailed description present example
and explanatory embodiments of the invention, and are intended to
provide an overview or framework for understanding the nature and
character of the invention as it is claimed. The accompanying
drawings are included to provide a further understanding of the
invention and are incorporated into and constitute a part of this
specification. The drawings illustrate various example embodiments
of the invention, and together with the description, serve to
explain the principles and operations of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The foregoing and other features and advantages of the
present invention will become apparent to those skilled in the art
to which the present invention relates upon reading the following
description with reference to the accompanying drawings, in
which:
[0010] FIG. 1 is a schematic front elevation view of a
refrigeration appliance illustrating one example dispensing
unit;
[0011] FIG. 2 is a schematic partial perspective view of a
refrigerator illustrating one example location of an example water
heater;
[0012] FIG. 3 is detail view of the example water heater of FIG.
2;
[0013] FIG. 4 is an enlarged detail view of an example dispensing
unit and user interface; and
[0014] FIGS. 5A-5B are two detail views of an example dispensing
nozzle in different positions.
DESCRIPTION OF EXAMPLE EMBODIMENTS
[0015] Example embodiments that incorporate one or more aspects of
the present application are described and illustrated in the
drawings. These illustrated examples are not intended to be a
limitation on the present application. For example, one or more
aspects of the present application can be utilized in other
embodiments and even other types of devices. Moreover, certain
terminology is used herein for convenience only and is not to be
taken as a limitation on the present application. Still further, in
the drawings, the same reference numerals are employed for
designating the same elements.
[0016] Turning to the shown example of FIG. 1, a refrigeration
appliance in the form of a refrigerator 10 is illustrated as a
side-by-side refrigerator with freezer and fresh food compartments.
Conventional refrigeration appliances, such as domestic
refrigerators, typically have both a fresh food compartment and a
freezer compartment or section. The fresh food compartment is where
food items such as fruits, vegetables, and beverages are stored and
the freezer compartment is where food items that are to be kept in
a frozen condition are stored. The refrigerators are provided with
a refrigeration system that maintains the fresh food compartment at
temperatures above 0.degree. C. and the freezer compartments at
temperatures below 0.degree. C. While the present application is
described herein by way of an example refrigeration appliance, it
is contemplated that various other appliances could also be used,
such as stoves, dishwashers, microwaves, stand-alone refrigerators,
freezers, or ice-makers, etc.
[0017] The arrangement of the fresh food and freezer compartments
with respect to one another in such refrigerators vary. For
example, in some cases, the freezer compartment is located above
the fresh food compartment (i.e., a top mount refrigerator), and in
other cases the freezer compartment is located below the fresh food
compartment (i.e. a bottom mount refrigerator). Additionally, many
modern refrigerators have their freezer compartments and fresh food
compartments arranged in a side-by-side relationship. Whatever
arrangement of the freezer compartment and the fresh food
compartment is employed, typically, separate access doors are
provided for the refrigerated compartments so that either
compartment may be accessed without exposing the other compartment
to the ambient air. For example, a door 12 provides access to the
freezer compartment, and a door 14 provides access to the fresh
food compartment of the refrigerator. Both of the doors are
pivotally coupled to a cabinet of the refrigerator 10 to restrict
and grant access to the fresh food and freezer compartments. While
the present application is described herein by way of an example
side-by-side refrigerator configuration, it is contemplated that
any refrigerator configuration can be used, such as top-mount or
bottom-mount refrigerators having at least one door.
[0018] Located generally centrally at the surface or exterior of
the door 12 is an example dispenser indicated generally at 30. It
is understood that dispenser 30 could also be located at various
locations on the refrigerator cabinet, refrigerator door or even
inside the refrigerator. As can best be seen in FIG. 1, the
dispenser 30 is located in a recess 16 in the door 12. The recess
comprises side walls or surfaces 18 and 20 that are opposite one
another, a bottom or lower wall or surface 22, an upper or top wall
or surface 24 and a back or rear wall or surface 26. A water
dispensing outlet 32 for dispensing cold water and an ice
dispensing outlet 34 for dispensing ice are located at the upper
surface 24 of the recess 16. In the shown embodiment of FIG. 1, the
dispenser 30 can include a single dispensing outlet for the water
32 and ice 34 arranged so as to substantially coincide with one
another at the upper surface 24 of the recess 16. However, in an
alternative embodiment (not shown), a single dispensing outlet for
water 32 and a single dispensing outlet for ice 34 can be arranged
so as to be spaced apart from one another at the upper surface 24
of the recess 16 across the width of the access door 12 and not
coincide with each other. The bottom surface 22 of the recess 16
can include a trough and/or drain for containing and/or draining
away excess water from the water dispensing outlet 32 and/or water
formed from melting ice from the ice dispensing outlet 34 that
comes to rest on the bottom surface 22.
[0019] Turning briefly to FIG. 2, at least one water line 36
extends from the water dispensing outlet 32 to a water source 60.
The water source 60 can be, for example the household water supply,
a water reservoir within the refrigerator or connected to the
household water supply, or such other sources as are familiar to
those having ordinary skill in the art. Additionally, at least one
water filter 62 can be located in fluid communication with the at
least one water line 36 to purify the incoming water. The water
filter 62 can be disposed in various locations, such as inside or
outside of the refrigerator 10, or even inside the door 12. A
solenoid-operated valve 37 can be located in fluid communication
with the water line 36 and can be controlled by control unit that
can include a microprocessor, for example as discussed below.
Though described as a solenoid-operated valve, other types of
valves can be used, such as motor actuated valves or the like.
[0020] The ice dispensing outlet 34 includes essentially an opening
in the upper surface 24 of the recess 16. The opening is in
communication with a source of ice such as, for example, the ice
storage bin of an ice making unit (not shown) located in the fresh
food or freezer compartment of the refrigerator. Typically, as is
familiar to those of ordinary skill in the art, the ice is
delivered from the ice storage bin to the ice dispensing outlet 34
by an auger which upon activation rotates so as to drive the ice
from the storage bin to the ice dispensing outlet 34. Activation of
the auger can be accomplished by the control unit that also
controls the operation of a solenoid-operated valve located in the
water line 36, or by other control structure.
[0021] At least one switch 38 can be electronically coupled to the
control unit and be configured to dispense either or both of water
from the water dispensing outlet 32 and ice from the ice dispensing
outlet 34. Alternatively, separate switches (not shown) can be
provided for each of the water dispensing outlet 32 and the ice
dispensing outlet 34. The at least one switch 38 can be a
contact-style switch, or can alternatively be non-contact style
switch, including other types of vessel detection such as optical,
visual, or ultrasonic, etc. In addition or alternatively, at least
these functions can be controlled by the microprocessor, which can
be appropriately programmed using information that is input by a
user to a user interface 40 that is electrically connected to the
microprocessor. The user interface 40 includes various control
features, such as cold water, crushed or cubed ice, child lockout,
lighting, etc. Thus, when a receiver vessel such as a glass is
inserted within the recess 16 and the switch 38 is activated, water
and/or ice can be dispensed on-demand into the receiver vessel.
[0022] The water line 36 can be provided to the water dispensing
outlet 32 in the door 12 in various manners. In one example, the
water line 36 can be provided to an aperture of the door 12 at
various locations using via a flexible line that is of sufficient
length and flexibility to accommodate the pivoting action of the
door 12 as it is selectively opened and closed. In another example,
the door 12 can be pivotally mounted to the cabinet 11 via a hollow
hinge 64 to selectively open and close at least a portion of the
refrigerated compartment. The hollow hinge 64 can provide the dual
purpose of enabling the door 12 to pivot, while also providing an
aperture therethrough to receive the water line 36. For example,
the hollow hinge 64 can include a hollow hinge pin or the like,
although various other hinges are considered. Moreover, although
the hollow hinge 64 is shown located towards a top surface of the
door 12, it is contemplated that the hollow hinge 64 could
similarly be disposed towards the middle or bottom of the door 12.
Thus, the water line 36 can pass through the hollow hinge 64, into
an interior of the door 12, and to the water dispensing outlet 32
of the dispenser 30.
[0023] Keeping with FIGS. 1-2, the appliance can further be
configured to dispense hot water upon request. Preferably, the
appliance can dispense hot water "instantly," meaning on demand in
a relatively short amount of time without having to maintain a
reservoir of hot water. In one example configuration, a water
heater 70 is mounted on an exterior surface of the cabinet 11 and
is configured to heat water supplied from the refrigerator, such as
from the water source 60. The in-line water heater 70 can heat
water on demand, thus, the refrigerator 10 generally does not store
water and no separate hot water tank is used for storing hot water
therein to improve space utilization efficiency of the refrigerator
10 and decrease heat insulation concerns. While an in-line style
heater is described herein, it is contemplated that various other
heater types and configurations could be used, such as a
cartridge-style heater or the like.
[0024] The water heater 70 can be located variously about exterior
surfaces of the cabinet 11, such as towards the top, side, bottom,
or rear, surfaces or even in the machine room. In one example, as
shown, the water heater 70 can be disposed on a top exterior
surface 13 of the cabinet 11. The water heater 70 may be located
generally about the hollow hinge 64, such as located variously
about the exterior surfaces of the cabinet 11 (e.g., the top
exterior surface 13 is shown) and spaced at various distances from
the hollow hinge 64, or could even in contact with the hollow hinge
64. Thus, heat generated by operation of the water heater 70 is
dissipated generally upwards into the ambient environment and away
from the refrigerated compartments. Optionally, a protective cover
66 is arranged over the water heater 70 to protect the heater
against user contact, moisture and/or dust. The protective cover 66
is preferably made of a temperature resistant material, such as
plastic or metal, and may include holes or grooves to facilitate
passive heat dissipation. The protective cover 66 is preferably
removable to permit service, and/or provides at least one removable
service panel. The protective cover 66 may also provide a visual
cover to hide the water heater 70 and associated elements from
view, such as from a user standing in front of the refrigerator 10.
The protective cover 66 may be separate from a hinge cover (not
shown) provided over the door hinge, or may be coupled to or formed
with such a hinge cover. In addition or alternatively, an upper
portion 15 of the refrigerator door 12 may extend upwards to
partially or completely obscure the hinge 64, water heater 70,
and/or protective cover 66 from view. An insulated shielding layer
(not shown) can be positioned between the water heater 70 and the
top exterior surface 13 of the cabinet 11 to inhibit undesired heat
from entering into the refrigerated compartment.
[0025] With reference to FIG. 3, a detail view illustrates one
example water heater 70 that includes an in-line style heater, with
a heating element 72 coupled to a water channel 74 to provide close
contact with the water flowing therethrough. The in-line style
heater generates heat through the application of electric power
thereto to heat the water flowing through water channel 74 to a
predetermined temperature. The close contact with the water
provides for efficient heating with less power consumption compared
to an external heater because there is less loss of heat generated
from the heater. It is contemplated that the heating element 72 can
directly contact and heat the water, or as shown, can indirectly
contact via the water channel 74 to heat the water. The water
channel 74 can be made of various materials having a relatively
high thermally conductivity (e.g., metal, such as aluminum, copper,
steel, etc.). While the illustrated example in-line style heater is
described as an example, it is understood that various other types
of water heaters having various configurations can also be used
without departing from the scope of the present application.
[0026] In the shown example, the heating element 72 can extend
along at least partially, such as substantially all of, a length of
the water channel 74 to thereby heat the water flowing through the
water channel 74. It is contemplated that the heating element 72
can follow along or even wrap about the water channel 74, or
vice-versa, such as with a coiled water channel about a cartridge
heater or the like. Additionally, although shown as a semi-circular
configuration, it is contemplated that the heating element 72
and/or water channel 74 can have various geometries. Preferably,
the heating element 72 and water channel 74 are configured to heat
the water quickly and on demand, with no separate hot water tank
for storing hot water, or for retaining much, if any, residual
water after the water heating process is complete.
[0027] Water from the water source 60 can enter the water channel
74 via an input 76, where it is heated by flowing through the water
channel 74 and along the heating element 72, and then exit the
water channel 74 via an outlet 78. Water flows from the water
source 60 through a water inlet line 80 to the water inlet 76 of
the water channel 74. The water inlet line 80 can be the same or
different from the water line 36 for the cold water dispenser
outlet 32. For example, as shown in FIG. 2, the water inlet line 80
for the water heater 70 can be independent from the water line 36
by a manifold 82, which can be a "T"-junction or the like. Where a
manifold 82 is used, it can be beneficial to provide a water filter
62 upstream of the manifold 82 so that a single filter can be used
to purify water for both of the water dispenser outlet 32 and water
heater 70 (and possibly other water-using devices, such as an ice
maker), although it is contemplated that a plurality of water
filters (not shown) can be used for each independent water line to
independently purify the different water streams. In another
embodiment (not shown), the water inlet line 80 can extend directly
from the water source 60 to the water heater 70.
[0028] Additionally, a solenoid-operated valve 84 can be located in
fluid communication with the water line 80 and can be controlled by
the control unit and/or microprocessor. Though described as a
solenoid-operated valve, other types of valves can be used, such as
motor actuated valves or the like. Operation of the valve 84
selectively permits the flow of water through the water heater 70.
In addition or alternatively, as will be discussed below, the valve
84 can also regulate the flow of water through the water heater 70.
An optional water flow meter 86 can also be installed on the water
inlet line 80 (before or after the water heater 70) and downstream
of the valve 84. The water flow meter 86 is configured to measure
an amount of water flowing through the water heater 70, such as a
water flow rate (volumetric flow or mass flow), or even a quantity
of water (volumetric or mass) that has passed through the water
heater 70. The water flow meter 86 may operate together with the
control unit and/or microprocessor, may be coupled to or part of
the valve 84, or may even operate independently. In one example,
the valve 84 (with or without the water flow meter 86) can
selectively restrict the water flow rate to be no more than a
predetermined amount, such as 7 oz/30 sec, although various flow
rates are contemplated. In another example, an independent
adjustable or non-adjustable flow regulator could be separate from
the valve 84 and placed in-line to restrict the water flow rate to
be no more than a predetermined amount. It is further contemplated
that the water flow meter 86 may also be used as a safety device to
permit operation of the water heating element 72 only when water is
sensed to be flowing through the hot water channel 74, and may
otherwise directly or indirectly inhibit operation of the heating
element 72. While only one valve 84 is shown, it is contemplated
that at least one more valve could be utilized near the dispenser
30 to inhibit after-flow of hot water after a dispensing operation
is complete.
[0029] In addition or alternatively, at least one temperature
sensor 88 can be associated with the water heater 70 to measure the
temperature of the heated water. In one example, the temperature
sensor 88 can be attached to the water channel 74 to measure the
temperature of the water in the hot water channel 74 being heated
by the heating element 72. It is contemplated that the temperature
sensor 88 can directly contact the water, or can indirectly contact
the water (as shown) via the water channel 74 to measure the water
temperature. Alternatively, the temperature sensor 88 can be
located downstream of the water channel 74, such as in-line with
the water outlet 78. Various types of temperature sensors can be
used, such as thermistors or thermocouples, or others as known in
the art. The temperature sensor 88 can indirectly or directly
control operation of the heating element 72 and/or valve 84, and
can be operatively coupled to the control unit and/or
microprocessor, or may even be coupled to or part of the valve 84,
or may even operate independently. Based on the measured water
temperature, the heating element 72 and/or valve 84 can be
selectively operated, such as to increase or decrease the amount of
heat applied to the water and/or the water flow rate. In addition
or alternatively, upon initial operation of the water heater 70,
the water flow can be reduced or even stopped by the valve 84 until
heating element 72 and/or water within the water channel 74 reaches
a predetermined operating temperature sensed by the temperature
sensor 88.
[0030] In addition or alternatively, more than one temperature
sensor can be utilized, such as a temperature sensor to measure the
incoming water temperature, and/or even the temperature of the
water ultimately dispensed to a user. For example, the control unit
or microprocessor can take into account temperature difference(s)
among any or all of the water source temperature, the measured
value of the water being heated by the heater, and the final
temperature ultimately dispensed to a user, and vary the operation
of the heating element 72 and/or valve 84. In addition or
alternatively, an overload sensor 89 can be operatively coupled to
the water heater 70 to provide overload protection during
operation. The overload sensor 89 can sense temperature and/or
electrical load (voltage, current, resistance, etc.) during
operation of the heating element 72, and if the sensed value
exceeds a predetermined amount, can directly or indirectly stop
operation of the heating element 72. For example, if the heating
element 72 exceeds a predetermined maximum temperature, and/or
exceeds a predetermined maximum electrical load, the overload
sensor 89 can stop operation of the heating element 72 directly,
such as acting like a fuse or circuit breaker, or can even function
indirectly via the control unit or microprocessor.
[0031] A hot water dispenser 90 is positioned on the door 12 that
is configured to dispense hot water supplied from the water heater
70 into a receiver vessel 92. The hot water dispenser 90 includes a
dispenser nozzle 94 for dispensing the hot water into the receiver
vessel 92. The hot water dispenser nozzle 94 is located within the
dispenser 30 and is spaced apart from the cold water dispenser
outlet 32 and ice dispensing outlet 34. A hot water conduit 96
extends from the water heater 70 to the hot water dispenser 90 to
supply the hot water from the water heater 70 to the dispenser
nozzle 94. The hot water conduit 96 is coupled to the hot water
outlet 78 of the water channel 74, and is guided through the hollow
hinge 64 to extend through the interior of the door 12 and to the
hot water dispenser nozzle 94. Depending upon where the water
heater 70 is spaced about the hollow hinge 64, the hot water
conduit 96 could include an insulated jacket or the like if the
water heater 70 is spaced a relatively large distance from the
hollow hinge 64. The hot water conduit 96 can be captured in the
door foam or even in its own channel. The hot water conduit 96 is
made of a material capable of withstanding the hot water
temperatures, and may be an insulated line. Additionally, the hot
water conduit 96 can extend through the same hollow hinge 64 as the
cold water line 36, and could be arranged in close proximity.
Optional separating structure may be provided to keep the two lines
spaced apart. For example, either or both line could include
insulation, and/or the hollow hinge 64 could be provided with
separate apertures (not shown) or even a separating wall (not
shown) within a common aperture.
[0032] In an effort to reduce the possibility of inadvertent hot
water dispensing, an example method of dispensing hot water
utilizes at least two distinct, user-initiated steps to permit the
dispensing of hot water. Turning now to FIGS. 4-5B, a hot water
user interface 100 can be provided to present various controls to
the user. Although shown as an independent interface, it is
understood that the hot water user interface 100 could also be a
part of the ice and water dispenser user interface 40 or even part
of another appliance user interface. However, it can be beneficial
for the entire hot water dispensing system to be separate from the
electronic controls of the refrigerator 10. Generally, the shown
example hot water user interface 100 includes a hot water
activation switch 102 to selectively operate the hot water heater
70. Operation of the hot water activation switch 102 by the user
can selectively turn the hot water dispensing system on and off,
and may include an alert, such as illuminated visual indicia 104 or
an audible sound, to indicate whether the hot water dispensing
system is active or inactive. When active, hot water can be
dispensed upon actuation of at least one additional switch the
user, while hot water dispensing is prevented when the system is in
an inactive state. It is understood that as used herein, the term
"actuating" refers to changing state (e.g., changing a state of a
switch from on to off or vice-versa, or some intermediate condition
over a range).
[0033] In a further example, the hot water user interface 100 can
include a hot water dispensing switch 106 configured to selectively
control dispensing of the hot water from the dispenser nozzle 94.
Operation of the hot water dispensing switch 106 by the user can
selectively cause water to flow through the water heater 70, such
as by operating the water valve 84. Operation of the hot water
dispensing switch 106 by the user may also cause the water heating
element 72 to operate and thereby heat the water. An alert, such as
illuminated visual indicia 108 or an audible sound can be provided
to indicate whether hot water is actively being dispensed by the
system.
[0034] It is further contemplated that the dispensing of the hot
water may be permitted only when the user is actuating one or more
of the switches. For example, the user can actively actuate both of
the hot water activation switch 102 and the hot water dispensing
switch 106 to permit dispensing, and the system will stop
dispensing if either switch is released. Actuating the hot water
activation switch 102 can selectively operate the hot water heater
70, including operating the water heating element 72 to heat the
water after the hot water activation switch 102 is actuated. Then,
actuating the hot water dispensing switch 106 can selectively
dispense hot water supplied from the water heater 70 via the
dispenser nozzle 94 and into the receiver vessel 92, after the hot
water dispensing switch 106 is actuated. In another example, the
hot water activation switch 102 may be actuated once, but the
dispensing of hot water is permitted only when the hot water
dispensing switch 106 is actively actuated. The hot water
dispensing will subsequently stop once the user releases the hot
water dispensing switch 106. In another example, the system can
stop dispensing if the hot water activation switch 102 is pressed
again to deactivate the system. Such methods utilize at least two
distinct, user-initiated steps to permit the dispensing of hot
water.
[0035] In yet another example, the hot water dispenser nozzle 94
can be selectively movable between at least a first position 110
and a second position 112. The first position 110 is a
non-dispensing position, in which dispensing of hot water is
inhibited, and the second position 112 is a dispensing position, in
which dispensing of hot water is permitted. Active movement of the
dispenser nozzle 94 between the first and second positions 110,
112, in combination with either or both of hot water activation
switch 102 and the hot water dispensing switch 106, can provide a
second (or third) distinct, user-initiated step to permit the
dispensing of hot water. The dispenser nozzle 94 can be selectively
movable between the first and second positions 110, 112 in various
manners. For example, the dispenser nozzle 94 can slide or
translate along one or more axes, such as left/right, front/back,
and/or up/down. In another example, the dispenser nozzle 94 can be
configured to rotate between the first and second positions 110,
112. As shown in FIG. 4, the dispenser nozzle 94 can rotate
generally left and right (or vice-versa), although it is
contemplated that the dispenser nozzle 94 can rotate along one or
more axes. It is further contemplated that the dispenser nozzle 94
can move in a straight path, angled path, curved path, and/or using
various slide and rotate combinations of the above-described
movements.
[0036] Turning briefly to FIGS. 5A-5B, which are schematic diagrams
of the hot water dispenser 90, the dispenser nozzle 94 can be
biased towards the first, non-dispensing position 110. A resilient
biasing member 114 (shown schematically in FIGS. 5A-5B), such as a
spring or the like, can bias the dispenser nozzle 94 towards the
first position 110. A handle 116 or similar structure can be
provided to facilitate movement of the dispenser nozzle 94. It is
further contemplated that movement of the dispenser nozzle 94 can
be performed manually, or even automatically such as by a
user-initiated motorized mechanism. Thus, inadvertent dispensing is
inhibited, and the user initiates an active step to permit the
dispensing of hot water. Additionally, at least one nozzle switch
120 is configured to be actuated when the dispensing nozzle is
moved to a selected one of the first position 110 and the second
position 112. As shown, the nozzle switch 120 is actuated when the
dispenser nozzle 94 is moved to the second position 112, although
it is contemplated that a nozzle switch could be actuated when the
dispenser nozzle 94 is moved away from the first position 110. It
is also contemplated that multiple switches could be used at both
of the first and second positions 110, 112. A carrier 122 is
operatively coupled to the dispenser nozzle 94 and is movable
therewith, and carries a projection 124 or similar structure for
actuating the nozzle switch 120. For example, FIG. 5A shows the hot
water dispenser 90 with the dispenser nozzle 94 in the first,
non-dispensing position and the nozzle switch 120 in a non-actuated
condition. Next, FIG. 5B shows the hot water dispenser 90 with the
dispenser nozzle 94 rotated to the second, dispensing position. The
carrier 122 has rotated together with the dispenser nozzle 94,
causing the projection 124 to engage the nozzle switch 120 so that
it is in an actuated condition. In other examples, the carrier 122
could be configured as a cam with an associated cam projection
configured to actuate the nozzle switch 120 upon movement, such as
rotation, of the carrier 122. It is understood that the
illustrations of FIGS. 5A-5B are schematic and show only one
example construction and movement of the dispenser nozzle 94 and
carrier 122, and that various other constructions and movements are
contemplated.
[0037] Example methods of dispensing hot water from the hot water
dispenser 90 will be described. In one example, the method includes
the steps actuating a hot water activation switch 102, and
actuating a hot water dispensing switch 106, to selectively operate
the hot water heater 70. Next, the water heating element 74 is
operated to heat water supplied from the appliance. Finally, hot
water supplied from the water heater 70 is dispensed from the
dispenser nozzle 94 and into the receiver vessel 92.
[0038] In another example, the method includes the steps of moving
the dispenser nozzle 94 from a first, non-dispensing position 110
to a second, dispensing position 112. A hot water activation switch
102 is actuated to selectively operate the hot water heater 70.
Next, the water heating element 74 is operated to heat water
supplied from the appliance after the dispenser nozzle 94 has moved
to the second, dispensing position 112 and the hot water activation
switch 102 is actuated. Finally, hot water supplied from the water
heater 70 is dispensed from the dispenser nozzle 94 and into the
receiver vessel 92.
[0039] The method can further include the step of actuating a hot
water dispensing switch 106, such that the step of dispensing hot
water occurs only while the hot water dispensing switch 106 is
actuated. Thus, the hot water activation switch 102 and movement of
the dispenser nozzle 94 could be considered precursor steps, and
dispensing of the hot water occurs only while the hot water
dispensing switch 106 is actively pressed. Alternatively, the step
of dispensing hot water can occur for a predetermined amount of
time (which can be preprogrammed, adjustable, and/or dependent upon
the size or type of beverage) after the hot water dispensing switch
106 is actuated, without needing to keep the button pressed. In
another example, dispensing hot water can occur only when the hot
water activation switch 102 is actuated prior to the hot water
dispensing switch 106, such that the hot water activation switch
102 can act as a system lock out. It is contemplated that the
operation of the switches 102, 106, 120 can be operated in a
specific order (e.g., 102 then 120 then 106, or 120 then 102 then
106, etc.) for the hot water system to function, or even in
out-of-order sequences. In addition or alternatively, the hot water
activation switch 102 could also provide the function of a child
lock that prevents operation of the water heater 70, such as by
deactivating the system when the activation switch 102 is pressed
and held for a predetermined amount of time (and unlocked in a
similar manner). A visual or audible alert can indicate lock
status. At the end of the hot water dispensing cycle, little, if
any, water remains in the hot water system. The total hot water
dispensing operation can be relatively quick, such as less than
about one minute. For example, the dispensing operation could last
for about 45 seconds, including about 7-8 seconds for warm-up, 30
seconds for dispensing, and about 7-8 seconds for finalization and
termination.
[0040] In addition or alternatively, the method can include time as
a variable for operation of the hot water system. Time between
actions can be measured variously, such as by the control unit or
microprocessor, or even independently. Thus, the hot water
dispensing system can be deactivated unless two or more buttons are
pressed by a user within a predetermined amount of time, such as
two to ten seconds (or other time), which can inhibit inadvertent
dispensing of hot water. In one example, the method can include the
step of measuring a period of time between actuation of the hot
water activation switch 102 and actuation of the hot water
dispensing switch 106, and hot water can be dispensed only when the
measured period of time is less than a predetermined time limit
(which can be fixed or adjustable). In another example, the method
can include the step of measuring a period of time between the
actuation of the hot water activation switch 102 and actuation of
the nozzle switch 120 via movement of the dispensing nozzle 94, and
hot water can be dispensed only when the measured period of time is
less than a predetermined time limit. It is contemplated that the
above time-measured steps can be combined in various orders. It is
further contemplated that the step of measuring a period of time
between different switch actuations can be done in multiple stages,
such as measuring a first period of time between two button presses
(e.g., between 102 and 120), and also a second period of time
between two button presses (e.g., between 120 and 106), and may
dispense hot water only if both measured time periods are less than
predetermined time limits. It is further contemplated that the step
of measuring a period of time between the switch actuations can be
done in an overall total elapsed time, such as measuring a total
elapsed time period of time between a first button press and a
final button press, regardless of intermediate button presses, such
as (e.g., between 102 and 106), and may dispense hot water only if
total elapsed time period is less than predetermined total time
limits. Various combinations of the above can be used. It is
further contemplated that one or more predetermined time limits can
be used, which can be similar or different.
[0041] In addition or alternatively, the method can include an
amount of water dispensed as a variable for operation of the hot
water system. The amount of dispensed water can be measured
variously using the control unit or microprocessor, such as by the
water flow meter 86 or even by dispensing time. Thus, the hot water
dispensing system can be deactivated once a predetermined amount of
hot water is dispensed by the system to inhibit inadvertent
over-dispensing of hot water. In one example, the method can
include the step of measuring an amount (volume or mass) of water
dispensed from the dispenser nozzle 94 and into the receiver vessel
92, and stopping the dispensing of hot water once the measured
amount of water is equal to or greater than a predetermined
dispensing amount limit. In another example, the method can include
an indirect measurement of the dispensed amount by measuring a
period of dispensing time when hot water is being dispensed from
the dispenser nozzle 94 and into the receiver vessel 92, and
stopping the dispensing of hot water once the measured dispensing
time is equal to or greater than a predetermined dispensing time
limit. In one example, the indirect measurement can be determined
by multiplying the dispensing time by a known or estimated water
volume or mass flow rate.
[0042] In addition or alternatively, the above dispensing system
can be configured to selectively adjust the temperature of the hot
water dispensed into the receiver vessel 92. For example, the
average drinking temperature for instant drinks is approximately
140.degree. F. In one embodiment, 140.degree. F. can be set as a
default temperature for hot water output. However, research has
shown that a temperature between approximately 180 to 185.degree.
F. is recommended as a serving temperature for instant coffee,
whereas serving temperature varies for tea products, with
recommended values to be about 150.degree. F. for green tea, about
165.degree. F. for white tea, about 180.degree. F. for oolong and
about 190.degree. F. for black tea.
[0043] The hot water user interface 100 can further include a
temperature selection interface 130 that can include a display 132
and/or various buttons, such as a temperature increase button 134
or temperature decrease button 136. The selective adjustment of
temperature can be manual, semi-automatic, or even completely
automatic. In one example, the selective temperature adjustment can
be performed automatically by the control unit or microprocessor
upon selection of a type of beverage by the user. Based on
predetermined values, and optionally adjusted based upon sensed
ambient temperature in the environment around the refrigerator 10,
the control unit or microprocessor can automatically adjust the
temperature of the hot water. In a semi-automatic mode, the user
can select a type of beverage and then utilize the temperature
increase or decrease buttons 134, 136 to adjust the temperature for
personal taste. In a manual mode, the user can utilize the
temperature increase or decrease buttons 134, 136 to adjust the
temperature to a desired value. After determining the temperature
for the hot water, the control unit or microprocessor can adjust
the temperature of the dispensed hot water by adjusting operation
of the heating element 72 (e.g., increase, decrease, pulse, etc.)
and/or adjusting operation of the water supply valve 84 to alter
the water flow through the water channel 74 (e.g., increase,
decrease, pulse, etc.). It is contemplated that the user can save
presets of favorite drinks, temperatures, or drink and temperature
combinations. It is further contemplated that the system can reset
to a default temperature each time the system is used, or may
recall the last drink or temperature.
[0044] In addition or alternatively, a service mode can be provided
to flush water through the hot water system (e.g., water channel
74, conduit 96, dispensing nozzle 94, etc.), with or without use of
the heating element 72. For example, the service mode can operate
the valve 84 without operating the heating element 72 to flush
water through the hot water dispensing system for service or
cleaning In another example, the service mode can operate the valve
84 while also operating the heating element 72 at a standard or
even extra-high temperature (e.g., the boiling point of water), to
sanitize flush water through the hot water dispensing system for
service or cleaning The amount of flushing water can be
predetermined or adjustable.
[0045] It is further contemplated that electrical lines (e.g.,
power, data, etc.) for any or all of the structure described herein
can also be guided through the hollow hinge 64 (e.g., user
interfaces 40, 100, heating element 72, valves 37, 84, sensors 86,
88, components of the dispensers 32, 34, 90, etc.).
[0046] It is understood that, in relation to sensed values, use of
the word "exceeds" (and similar words/phrases) refers to sensed
values that differ to greater or lesser amount as compared to a
known value. Thus, a sensed value can exceed a known value by being
greater than or less than the known value by a certain amount.
[0047] The invention has been described with reference to the
example embodiments described above. Modifications and alterations
will occur to others upon a reading and understanding of this
specification. Examples embodiments incorporating one or more
aspects of the invention are intended to include all such
modifications and alterations insofar as they come within the scope
of the appended claims.
* * * * *